<ti-button-group [items]="items" [(ngModel)]="selected" valueKey="english"></ti-button-group>
<div class="current-value-container">
  <pre>Current value: {{ selected | json }}</pre>
</div>
<br />
<ti-button-group [multiple]="true" [items]="items1" [(ngModel)]="selected1" valueKey="english"></ti-button-group>
<div class="current-value-container">
  <pre>Current value: {{ selected1 | json }}</pre>
</div>
